Abstract
The purpose of this study is to investigate the effects of building geometry on tall-building aerodynamics, accompanying the analysis for low-rise buildings found in the companion paper. Aerodynamic data for total of 30 rectangular-plan buildings were obtained in wind tunnel experiments. This work tested building configurations with plan aspect ratios, (where is the horizontal dimension parallel to the wind and is the across-wind dimension) ranging from 0.25 to 4 and height ratios, (where is roof height and is the least horizontal dimension) ranging from 1 to 12. Additionally, this work made systematical comparisons with wind load provisions in Chapter 27 of ASCE 7-16. Buildings with ratios of have aerodynamic coefficients that are approximately constant, which means that this can be a practical aerodynamic definition of high-rise buildings. There is continuous variation of the aerodynamic coefficients for such that differentiation of mid-rise and low-rise buildings may be considered as arbitrary from an aerodynamics perspective. Wind load coefficients for mid-rise buildings are observed to be lower than for high-rise buildings. However, for both mid-rise and high-rise buildings, largest load coefficients are observed for . The plan ratio of captures the variation of the load coefficients for high-rise buildings. For lower buildings, both and ratios are needed to define the wind loads.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the partial financial support of the Natural Sciences and Engineering Research Council (NSERC) of Canada through the Discovery Grants program for salary support for JW and the Charles Pankow Foundation of the Structural Engineering Institute for partial support of the costs of the experiments. The authors are grateful to an advisory group made up of members of the ASCE 7-22 Wind Loads Sub-Committee, chaired by Don Scott. GAK gratefully acknowledges the support of ImpactWX and the University of Western Ontario.
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© 2020 American Society of Civil Engineers.
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Received: May 12, 2020
Accepted: Sep 18, 2020
Published online: Dec 21, 2020
Published in print: Mar 1, 2021
Discussion open until: May 21, 2021
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